#nullable enable
using UnityEngine;
using UnityEngine.UIElements;

namespace UVC.UIToolkit
{
    /// <summary>
    /// 3D 벡터 속성 아이템
    /// X, Y, Z 세 개의 FloatField 사용
    /// </summary>
    public class UTKVector3PropertyItem : UTKPropertyItemBase<Vector3>
    {
        #region Fields
        private FloatField? _xField;
        private FloatField? _yField;
        private FloatField? _zField;
        #endregion

        #region Properties
        public override UTKPropertyType PropertyType => UTKPropertyType.Vector3;
        #endregion

        #region Constructor
        public UTKVector3PropertyItem(string id, string name, Vector3 initialValue = default)
            : base(id, name, initialValue)
        {
        }
        #endregion

        #region Override Methods
        public override VisualElement CreateUI()
        {
            var container = CreateContainer();

            var label = CreateNameLabel();
            container.Add(label);

            var valueContainer = new VisualElement();
            valueContainer.AddToClassList("utk-property-item__value");

            // X 필드
            var xContainer = new VisualElement();
            xContainer.AddToClassList("utk-property-item__vector-field");
            xContainer.style.flexDirection = FlexDirection.Row;

            var xLabel = new Label("X");
            xLabel.AddToClassList("utk-property-item__vector-label");
            xLabel.AddToClassList("utk-vector-label--x");

            _xField = new FloatField();
            _xField.name = "x-field";
            _xField.value = Value.x;
            _xField.style.flexGrow = 1;

            xContainer.Add(xLabel);
            xContainer.Add(_xField);
            valueContainer.Add(xContainer);

            // Y 필드
            var yContainer = new VisualElement();
            yContainer.AddToClassList("utk-property-item__vector-field");
            yContainer.style.flexDirection = FlexDirection.Row;

            var yLabel = new Label("Y");
            yLabel.AddToClassList("utk-property-item__vector-label");
            yLabel.AddToClassList("utk-vector-label--y");

            _yField = new FloatField();
            _yField.name = "y-field";
            _yField.value = Value.y;
            _yField.style.flexGrow = 1;

            yContainer.Add(yLabel);
            yContainer.Add(_yField);
            valueContainer.Add(yContainer);

            // Z 필드
            var zContainer = new VisualElement();
            zContainer.AddToClassList("utk-property-item__vector-field");
            zContainer.style.flexDirection = FlexDirection.Row;

            var zLabel = new Label("Z");
            zLabel.AddToClassList("utk-property-item__vector-label");
            zLabel.AddToClassList("utk-vector-label--z");

            _zField = new FloatField();
            _zField.name = "z-field";
            _zField.value = Value.z;
            _zField.style.flexGrow = 1;

            zContainer.Add(zLabel);
            zContainer.Add(_zField);
            valueContainer.Add(zContainer);

            container.Add(valueContainer);

            return container;
        }

        public override void BindUI(VisualElement element)
        {
            base.BindUI(element);

            _xField = element.Q<FloatField>("x-field");
            _yField = element.Q<FloatField>("y-field");
            _zField = element.Q<FloatField>("z-field");

            if (_xField != null)
            {
                _xField.value = Value.x;
                _xField.SetEnabled(!IsReadOnly);
                _xField.RegisterValueChangedCallback(OnXChanged);
            }

            if (_yField != null)
            {
                _yField.value = Value.y;
                _yField.SetEnabled(!IsReadOnly);
                _yField.RegisterValueChangedCallback(OnYChanged);
            }

            if (_zField != null)
            {
                _zField.value = Value.z;
                _zField.SetEnabled(!IsReadOnly);
                _zField.RegisterValueChangedCallback(OnZChanged);
            }
        }

        public override void UnbindUI(VisualElement element)
        {
            if (_xField != null)
            {
                _xField.UnregisterValueChangedCallback(OnXChanged);
                _xField = null;
            }

            if (_yField != null)
            {
                _yField.UnregisterValueChangedCallback(OnYChanged);
                _yField = null;
            }

            if (_zField != null)
            {
                _zField.UnregisterValueChangedCallback(OnZChanged);
                _zField = null;
            }

            base.UnbindUI(element);
        }

        public override void RefreshUI()
        {
            if (_xField != null && !Mathf.Approximately(_xField.value, Value.x))
            {
                _xField.SetValueWithoutNotify(Value.x);
            }

            if (_yField != null && !Mathf.Approximately(_yField.value, Value.y))
            {
                _yField.SetValueWithoutNotify(Value.y);
            }

            if (_zField != null && !Mathf.Approximately(_zField.value, Value.z))
            {
                _zField.SetValueWithoutNotify(Value.z);
            }
        }

        protected override void UpdateReadOnlyState()
        {
            base.UpdateReadOnlyState();

            _xField?.SetEnabled(!IsReadOnly);
            _yField?.SetEnabled(!IsReadOnly);
            _zField?.SetEnabled(!IsReadOnly);
        }
        #endregion

        #region Private Methods
        private void OnXChanged(ChangeEvent<float> evt)
        {
            var newValue = new Vector3(evt.newValue, Value.y, Value.z);
            DebounceValueChange(newValue, 100).Forget();
        }

        private void OnYChanged(ChangeEvent<float> evt)
        {
            var newValue = new Vector3(Value.x, evt.newValue, Value.z);
            DebounceValueChange(newValue, 100).Forget();
        }

        private void OnZChanged(ChangeEvent<float> evt)
        {
            var newValue = new Vector3(Value.x, Value.y, evt.newValue);
            DebounceValueChange(newValue, 100).Forget();
        }
        #endregion
    }
}